Abstract This work is devoted to the study of composite system of liquid crystal 4-(trans-4-n-hexylcyclohexyl)-isothiocyanato-benzene (6CHBT) doped with lath-like goethite magnetic nanoparticles with the concentration of 0.01 vol%. The structural transitions in ferronematic samples were observed by dielectric measurements in a capacitor made of ITO-coated glass electrodes as well as by polarizing optical microscopy. Due to the presence of magnetic particles a decrease of the magnetic Freedericksz transition was observed. The response of ferronematics to very low magnetic fields is also presented which opens the door towards application possibilities such as low magnetic fields sensors.

中文翻译：

---

针铁矿纳米棒对液晶6CHBT结构转变的影响

摘要 本工作致力于研究掺杂浓度为0.01 vol%的板条状针铁矿磁性纳米粒子的液晶4-(反式-4-正己基环己基)-异硫氰酸根合-苯(6CHBT)复合体系。通过在由 ITO 涂层玻璃电极制成的电容器中的介电测量以及通过偏振光学显微镜观察铁酮样品中的结构转变。由于磁性颗粒的存在，观察到磁性 Freedericksz 跃迁的减少。还介绍了铁磁体对极低磁场的响应，这为低磁场传感器等应用可能性打开了大门。